| Information | Year |
| Lion-O's catchphrase is 'Whiskers!' | |
| Thunderans have long believed technology to be a myth. | |
| Grune used to be Panthro's best friend. | |
| Claudus is killed by Mumm-Ra. | |
| Slythe is from the planet Plun-Darr. | |
| Lynx-O is a general in Claudus' army. | |
| The ThunderCats are from the planet Thundera. | |
| The ThunderCats return to New Thundera. | |
| Lion-O arrives on Third Earth by riding on a spaceship. | |
| Snarf can talk. | |
| The ThunderCats are from the planet Thundera. | |
| Lion-O is a lion cub trapped in an adult lion's body. | |
| Tygra is Lion-O's adopted older brother. | |
| Jaga dies of old age. | |
| Panthro has mutton chops. | |
| Grune used to be Panthro's best friend. | |
| Mumm-Ra has a bulldog named Ma-Mutt. | |
| Slythe is from the planet Plun-Darr. | |
| Komi, Cask, and Sarrow are some of Slythe's lizards. | |
| Snarf can talk. | |
| Lynx-O is a general in Claudus' army. | |
| Thunderans have long believed technology to be a myth. | |
| Jaga and the other clerics shared Cheetara's super speed. | |
| WilyKit and WilyKat ride on 'space boards'. | |
| Lion-O's catchphrase is 'Whiskers!' | |
| Slythe works with the mutants Monkian, Jackalman, and Vultureman. | |
| Mumm-Ra the Ever-Living has wings. | |
| The ThunderCats return to New Thundera. | |
| Lion-O arrives on Third Earth by riding on a spaceship. | |
| Claudus is killed by Mumm-Ra. | |